diff --git a/src-ui/src/app/components/admin/settings/settings.component.ts b/src-ui/src/app/components/admin/settings/settings.component.ts
index 2d3960dc5..57d308969 100644
--- a/src-ui/src/app/components/admin/settings/settings.component.ts
+++ b/src-ui/src/app/components/admin/settings/settings.component.ts
@@ -416,7 +416,7 @@ export class SettingsComponent
     )
     this.settings.set(
       SETTINGS_KEYS.THEME_COLOR,
-      this.settingsForm.value.themeColor.toString()
+      this.settingsForm.value.themeColor
     )
     this.settings.set(
       SETTINGS_KEYS.USE_NATIVE_PDF_VIEWER,